I found these on 24th June in the edge of a field at the bottom of The Wash. They are only good for scrapping but I couldn't expect anything else from them, considering they have been there for around 75 years and have had agricultural vehicles and farming chemicals over them for most of that time. The field was reclaimed from the sea when a new sea bank was erected in 1951. It took a fair bit of wire brush work before I could read the bases. I hope to go back and get on the rest of the field when the crop is lifted. The base markings are KS 43, LM 43 and SL 4.
